Ubuntu alert USN-1117-1 (policykit-1)

From:
    	       Kees Cook <kees@ubuntu.com> 
To:
    	       ubuntu-security-announce@lists.ubuntu.com 
Subject:
    	       [USN-1117-1] PolicyKit vulnerability 
Date:
    	       Tue, 19 Apr 2011 16:49:14 -0700
Message-ID:
    	       <20110419234914.GF4800@outflux.net>
Cc:
    	       full-disclosure@lists.grok.org.uk, bugtraq@securityfocus.com
Archive-link:
    	       Article, Thread

==========================================================================
Ubuntu Security Notice USN-1117-1
April 19, 2011

policykit-1 vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 10.10
- Ubuntu 10.04 LTS
- Ubuntu 9.10

Summary:

Local users could gain root access by using the pkexec tool in PolicyKit.

Software Description:
- policykit-1: framework for managing administrative policies and privileges

Details:

Neel Mehta discovered that PolicyKit did not correctly verify the user
making authorization requests. A local attacker could exploit this to
trick pkexec into running applications with root privileges.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 10.10:
  libpolkit-backend-1-0           0.96-2ubuntu1.1

Ubuntu 10.04 LTS:
  libpolkit-backend-1-0           0.96-2ubuntu0.1

Ubuntu 9.10:
  libpolkit-backend-1-0           0.94-1ubuntu1.1

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
  CVE-2011-1485

Package Information:
  https://launchpad.net/ubuntu/+source/policykit-1/0.96-2ub...
  https://launchpad.net/ubuntu/+source/policykit-1/0.96-2ub...
  https://launchpad.net/ubuntu/+source/policykit-1/0.94-1ub...

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